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I need a Commodore Plus/4 Video Cable

by gmast＠polymail.cpunix.calpoly.edu

To whomever needs that cable, I have one (maybe 2) for a C-64. $3 (postage) and it's yours. Greg

28 years, 8 months

New mailing list for old electronic calculator collectors.

by kevan＠motiv.co.uk

Hi all, I have created a mailing list for the discussion of old electronic calculators. To subscribe send a message to: ecalc-request(a)lists.heydon.org with the single word 'subscribe' in the body of the message. Once you are subscribed you may send submissions to: ecalc(a)lists.heydon.org Regards -- Kevan Old Computer Collector: http://staff.motiv.co.uk/~kevan/

28 years, 8 months

Epson PX-8, no power up

by dastar＠crl.com

On Wed, 31 Dec 1969, Marvin wrote: > I just plugged in the Epson PX-8 and the only thing that happens is the > LCD screen turns on, but nothing else. I plugged in a power supply to > charge the battery (and then checked the battery voltage) so that is not > the problem. I also pressed both the outside reset switch with no > response, and then pressed the "master" reset switch in the compartment > on the bottom of the machine, again with no response. When the bottom > was opened, there was space for two ROMs; the center one was empty and > the one to the side had an Epson ROM of some sort installed. There was Marvin, the socket labelled ROM1 should have an Epson ROM in it, and as far as I know it is the O/S ROM. ROM2 socket on mine has Portable WordStar and is not necessary to run the system as far as I know. In fact, I just pulled the ROM on mine and the system still came up (BTW, those ROMs are neat...they have a little plastic bucket that the ROM sits in that makes it easy to pull them out and re-insert them). My battery is worn and does not hold a charge anymore, but it will recharge and operate for a little while (how long I don't know since I never have it on for more than a few minutes) but as soon as I plug in the power supply it works fine. Inside the ROM compartment you will notice an "Initial Reset" button. Have you tried pressing that? There is also a dip switch inside (SW4)...my settings are as follows: 1:ON 2:ON 3:ON 4:ON 5:OFF 6:ON 7:OFF 8:OFF There is a smaller compartment on the bottom near that back of the unit...did you make sure there is a ROM in there? Is it seated correctly? Hope this helps in some small way. Sam ------------------------------------------------------------------------------- Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass

28 years, 8 months

Zenith ?????

by groberts＠mitre.org

i believe it's a "dumb terminal" that uses NTSC video - probably emulates either the H19 or VT100 (or both). i think the "save" button is used in configuring (and saving) terminal options. - glenn At 04:00 PM 12/31/70 +0000, Marvin wrote: >Among the things I picked up yesterday was a Zenith Data Systems >keyboard, model ZTX-1-A. The top of the keyboard looks like a regular >keyboard but the back has an RCA jack labeled "Video Output", a 40 pin >header labeled "Printer", a pushbutton labeled "Save", a db9 male >connector labeled "Power", two phone jacks labeled "Phone Connect" and >"Wall Connect", and a switch near the phone jacks labeled >"Multiline/Single Line". Anyone have any idea what this thing is? >Thanks. > > > +=========================================================+ | Glenn F. Roberts, Falls Church, VA | Comments are my own and not the opinion of my employer | groberts(a)mitre.org

28 years, 8 months

Some Great deals on AuctionWeb

by gmast＠polymail.cpunix.calpoly.edu

> On 21 Jul 97 at 10:15, Greg Mast wrote: > > Apple III External Floppy Drive **PHOTO** > I noticed the current bid for this was $103.50. I'd love to hear if > you actually collect that much for it. I can't believe someone > actually wants it THAT bad. Me too. I figured $20-$30. But who am I to complain? But like they say, talk is cheap. We'll see if they pull through. I had a Radio Shack hard drive that was bid up to $150 a while back. Both high bidders flaked and I relisted it and sold it for $30. Go figure. On the other hand, I had a garage sale last weekend. Not one person interested in the piles of Apple, Commodore, Atari stuff. I mean, if you guys aren't going to garage sales to buy stuff, you're missing a lot of deals. Most of the stuff at the Goodwill has an old garage sale sticker on it.

28 years, 8 months

Bad Joke. Bad Bad Bad! Front panel for a PC?

by IVIE＠cc.usu.edu

> I.E Making a new ROM. Well, I do have the IBM PC manual that has the ROM > unassembled in it... I thought those panels worked by playing with the > lines on the CPU. Sounds like more work than I have time to do now. I do > know that E11 lets you pull this off via the paralell port. It would be a > neat trick, if I had time to work at it. They do work by playing with the lines on the CPU. However, the 8088 (and most microprocessors) do not allow you to get to the internal registers >from the bus. It works on the PDP-11 because the registers have a bus address; i.e., you can DMA into registers. This stopped being possible on the microprocessor implementations of the the PDP-11, which is where MicroODT fills in. Roger ivie ivie(a)cc.usu.edu

28 years, 8 months

10base2

by allisonp＠world.std.com

Quick question: 10base2 (cheapernet) thin coax eithernet: What is the minimum cable length? Everything I have has the maximum and I remember there is a minimim. Allison

28 years, 8 months

10base2

by thedm＠sunflower.com

Minimum is 1 meter, max is 185m 25ohm terminator at each in, 48 drops per segment. ---------- > From: Allison J Parent <allisonp(a)world.std.com> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: 10base2 > Date: Monday, July 28, 1997 1:00 PM > > Quick question: > > 10base2 (cheapernet) thin coax eithernet: What is the minimum cable length? > Everything I have has the maximum and I remember there is a minimim. > > Allison

28 years, 8 months

Bad Joke. Bad Bad Bad! Front panel for a PC?

by allisonp＠world.std.com

<but then again, I do have a PC-XT motherboard to waste... It would be <interesting... Is it possible? It would score high on the nerdity <scale... The 8088 would be difficult to make a hardware style front pannel like the PDP-8e or 11/70s had but a software front pannel is doable with a spare parallel port or homebrew IO card. It would have to ahve some software to dump registers to lights based on switchs, load registers from switches (at least 16 of them for data/addresses) also other things like single stepping and single instruction would have to be handled. The other possibility is an embedded ODT like the 11/03, 11/23 or later q-bus PDP-11s have. IT allows memory display, changing locations, halting, running from an address and display/load registers from a terminal(console). Allison

28 years, 8 months

VIC-20 Kernel Project

by rcini＠msn.com

On Sun, 27 Jul 1997 14:13:00 -0500 (CDT), Brett <danjo(a)xnet.com> wrote: >>Unless someone can verify the legal status of the copyrights on the ROMs. >>I am a little busy setting up Rescue trips to dig much further into THAT >>moras of mumbo-jumbo. I got my copies of the ROM images off of ftp.funet.fi. It seems that this Finland ftp site has boat loads of Commodore software, including the ROM images to be used for emulators (I used mine for the PC-VIC emulator and as a known-good ROM image to compare my Kernel assemblies with). If my wife really understood what I was doing with the VIC Kernel project, she'd probably say "Why??" too. But, it's really more of saying to myself that I reverse-engineered object-code into a recompilable file and that I learned something than anything else. Since I can't yet really own the source code, I made my own <g>. ------------------------------------------------- Rich Cini/WUGNET e-mail: rcini(a)msn.com - ClubWin Charter Member (6) - MCPS Windows 95/Netowrking

28 years, 8 months

I need a Commodore Plus/4 Video Cable

by 107765.1161＠compuserve.com

Message text written by INTERNET:classiccmp@u.washington.edu >>The 8-pin cable for the Plus/4 is exactly the same as the 8-pin cable for the (more common) Commodore 64 or 128. << >> Finally, if you want to hack one together, I can provide the pinout.<< >I'd like the Pinout!!< First, the Commodore 8-pin DIN connector is the unusual one; the "Hershman" or something. This means that pins 7 and 8 are not in the same positions as on the common 8-pin DIN connector. (Look at the port to confirm pin placement; I'm not sure the chart below is correct.) One easy solution here is to cut pins 7 and 8 off a common 8-pin connector; they aren't needed for anything. Or as explained below, you can use a common 5-pin DIN connector; but, if you're hooking to a separated color composite monitor, your picture won't be QUITE as sharp. Looking at the port on the back of the computer, OR at the BACK of the DIN plug (the side you'll attach the wires to), the pinout is: 8 7 3 6 1 5 4 2 Connections are: 1 Luminance 2 GRND 3 Audio 4 Color Composite 5 Audio In (not used) 6 Chroma 7 NC 8 NC Hook up pin 3 for audio in all cases. As to video, if you're using a separated color composite monitor, do separate RCA plugs for 1 and 6. If you're using a color composite monitor with the single input, use 4. If you have monochrome, use 1. If you want to use a 5-pin DIN connector with a separated color composite monitor, do separate RCA plugs for pins 1 and 4.

28 years, 8 months

I need a Commodore Plus/4 Video Cable

by 107765.1161＠compuserve.com

Message text written by INTERNET:classiccmp@u.washington.edu >> >Does anyone have a Commodore Plus/4 video cable for sale or trade?<<< >> (the early models had a 5-pin port) will also work on a Plus/4. In fact, I think most home computer manufacturers (Atari, TI) used 5-pin cables with the composite, sound and ground on the same pins, so you could try one of<< >I have a TI/994a converter box...will this work?< The TI 99/4a doesn't have an internal RF modulator; that's what the box does. So even on a TI, you only need the box (and can only use the box) if you're hooking to a TV. The Plus/4 has an internal RF modulator, so if you want to hook to a TV all you need is an RCA-RCA cable and an ordinary game/TV switch. I *assumed* (and we all know what happens when we "ass u me") that when you said "video cable", you meant a monitor cable. As I said, it's the same as the C64 and some other computers use, so it shouldn't be all that rare. I'm sure anybody could sell you one (including me) for $5 and postage. Gil Parrish 107765.1161(a)compuserve.com

28 years, 8 months

VIC-20 Kernel Project

by rcini＠msn.com

On Fri, 25 Jul 1997 15:51:33 -0400, Gil Parrish wrote: > For the last two years, I have been working on making a recompilable version of the VIC-20 Kernel ROM.< >>OK, I'm not afraid to ask the amateur question: Why? >>I'd love to see someone with good programming skills write some >>sophisticated software for the VIC-20, likely requiring at least a 16K >>expander or something. If your project will help lead to that, I'm all >>for it. Well, Gil, I used it as a learning project. When I first got my VIC-20 in 1981/2, I was in junior high school. I programmed mostly in BASIC, and did a little ML. After I graduated, I got involved in too many other things: my fraternity, my wife, a job, the Mac, and then Windows hacking. When I bought my house two years ago, I moved all of my old machines and started playing with them again. So...I wanted to re-learn 6502 ML and the VIC/CBM architecture. I thought that documenting the VIC Kernel (some thing that I had never seen in print) would be a nice project. Also, I thought that it sould be good to have recompilable Kernel code, if I ever needed to recompile it. Documenting the Kernel enables the programmer to understand what's in the "black box." This is why AndrewShulman and Matt Pietrek have made a fortune in books detailing the internals of Windows. ------------------------ Rich Cini/WUGNET rcini(a)msn.com - ClubWin Charter Member (6) - MCPS Windows 95/Networking

28 years, 8 months

Aquarius Stuff

by marvin＠rain.org

I found I sent this email to Sam instead of mailing to the listserver so I am just reposting in case anyone is interested. > Now you did it, I had to go back and look at all the stuff again, darn > > :). Everything below has the Aquarius name and logo on it. The > 4-color > printer turned out to be Radofin Electronics. This is actually what > came in the lot: Prices are from the Crimac, Inc. Aquarius Order form > > before the discount. The only date is on the order form and states > that > 10% can be deducted if mailed by January 31, 1985. The prices are > from > that flyer as obtained from a copy of the original order. The next > flyer from Crimac showed a price increase of about 20%. Pricing is > qualified when the model number on the box did not match the order. > > Mattel Electronics Aquarius > Ser # RH0115319 > Model # 5931 > Missing original box and packaging, but has docs > No Price listed > > Mattel Electronics Data Recorder Ser # RH000151 > Added label - Mattel Electronics, Mfg by Radofin > Model # 4394 > Price - $31.95 for Model # 4394R > > Mattel Electronics Mini Expander Ser # RH0109348 > Model # 4063 > Price - $43.95 for Model # 4063R > > Radofin Electronics 4-Color Printer Ser # RH0500203 > No indication of mfg on printer, only Radofin on box > Missing printer cable > Model # 4615R > Price - $109.00 > > Mattel Electronics Space Speller Cartridge > Only Mattel label on box is "(c) Mattel Electronics, Inc. 1983" > Model # GMN0014 > Price - $19.95 for Model 4682R > > Mattel Electonics FileForm Cartridge > Model # 4177 > Price - $29.95 for Model 4177R > > Radofin Electronics 32K Memory Module > Model # 4217R > Price - $74.95

28 years, 8 months

IBM PCjr Power Supplies

by ard＠siva.bris.ac.uk

>A while ago I promised two people that I would fetch them some IBM PCjr >power supplies if I ever found them. Well, I found some today. I've got Incidentally, I built a PSU for my PC-jr last week. I used a simple 15V AC transformer, no centre tap or anything like that. The only one I could find was 50VA, which is marginal, but not too bad. The ends of the secondary go to the outside 2 pins of the PC-jr power connector. The central pin goes to mains earth and to nothing on the secondary side at all. Oh, I put a 3.15A fuse in series with the secondary to protect the transformer. It works fine. My PC-jr boots, and all PSU outputs (including the -ve one) are present and correct. > >Sam -tony

28 years, 8 months

Freebie Okidata Okimate 10 Printer

by gmast＠polymail.cpunix.calpoly.edu

You pay UPS for 7 lbs from 93405. Printer only, no interface cable. Was used with C-64. Untested but looks good. Check the <a href=http://www.ups.com/using/services/rave/rate.html> UPS Rate Calculator </a> to figure shipping. And be sure to add about $1 because those quotes are commercial pick-up rates.

28 years, 8 months

Hayes MicroModem II Micro-coupler

by dastar＠crl.com

Was there some bloke on this discussion who was asking for the Hayes micro-coupler the other day? I have an extra one if you still need it. E-mail me. Sam ------------------------------------------------------------------------------- Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass

28 years, 8 months

Commodore Liquidation!

by gmast＠polymail.cpunix.calpoly.edu

I have the following Commodore stuff for sale. Discount for more than one item (you save on shipping too) VIC-1541 Drive (2 ea) $5 ea 1541 Drive (2 ea) $5 ea C-64 in orig box w/ps(1 ea) $5 Commodore joysticks (1 pr) $5 Untested C-64 Power Supplies (6 ea) $3 ea Remember to add shipping to what its worth to you. Use the UPS site: <a href=http://www.ups.com/using/services/rave/rate.html> UPS Rate Calculator </a> to figure shipping. And be sure to add $1 because those quotes are commercial pick-up rates. Drives and C-64s are about 11 lbs ea. My ZIP is 93405. I also have a pile of cables and stuff that I haven't look through yet. Will throw in whatever cables and manuals I can find that go with each item, no guarantees though. Also, Im pretty sure I ran all these but not positive. I don't have time to test all this stuff. Sold AS-IS. Make me an offer on all or some of it! It's going to go one way or another so if it doesn't sell, I'll give it away for shipping cost. If that doesn't work it shall return to the thrift store from whence it came!

28 years, 8 months

IBM PCjr Power Supplies

by dastar＠crl.com

A while ago I promised two people that I would fetch them some IBM PCjr power supplies if I ever found them. Well, I found some today. I've got two up for grabs. Please e-mail me if you were one of the two people who inquired about one. If you weren't, e-mail me anyway and I will send them to you if the other two guys don't respond. To the two guys whose names I forgot: sorry for forgetting your names! Sam ------------------------------------------------------------------------------- Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass

28 years, 8 months

Can someone decipher this panic?

by allisonp＠world.std.com

A-B C-D < ---+----------+---------+ < 1 | M7606 =============| < 2 | M7608 =============| < 3 | M3106 === | < 4 | M7516YM== | < ---+----------+---------+ < 5 | M7546====|M7555====| < 6 | < 7 | < 8 | < 9 | < 10 | < 11 | < 12 | < ---+----------+---------+ < 13 | | HDCNCTRS < Slot 13 bottom is not the HD controller, it's the distribution card. There should be a 50pin cable bettween the m9058 and the m7555(rqdx3) card. Pull the m3106 and bump the rest up one with the last one being the m7555. It shouldn't make a difference but at this point you don't need it to boot. This will give you a minimal config for the bus. Also make sure the overt the top cable for the memory is good! A-B C-D ---+----------+---------+ 1 | M7606 =============| 2 | M7608 =============| 3 | M7546 === | 4 | M7555 === | ---+----------+---------+ 5 |===Q->====|==Q->====| 6 |====<-Q===|===<-Q===| 7 |===Q->====|===Q->===| The arrows are added to indicate the qbus grant flow for the bus starting at row 5. Allison

28 years, 8 months

(fwd) Apple /// FS (fwd)

by dastar＠crl.com

Here's an Apple /// for sale. I've seen them go for much cheaper. Sam ------------------------------------------------------------------------------- Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass ---------- Forwarded message ---------- From: sundeck(a)ix.netcom.com(N.J.C.) Newsgroups: comp.sys.apple2.marketplace Subject: Apple /// FS Date: 24 Jul 1997 12:31:32 GMT one Apple /// with Apple /// monitor and 2 nd drive , some software $150 plus shipping sundeck(a)ix.netcom.com or eflea(a)atlantic.net -- Sam ------------------------------------------------------------------------------- Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass

28 years, 8 months

The Rescuer's Conundrum

by ard＠siva.bris.ac.uk

>Or otherwise stated: What to do when the cost of reviving a rescued >computer is as much as buying one of the same model? > >To explain, I recently rescued a Mac+ (2.5/40) which was being thrown >out by my employer. When I got it, it would give intermittant Sad Mac >errors. No problem, I figure I can replace the RAM with some surplus >PC SIMMs. This fixes the Sad Macs, but after it heats up it dies with >an "Address Error" bomb. Some board switching points to the motherboard >(more specifically, the ROMs) as being the fault. Hmmm... My first thought is to fix the old board : Since the ROMs work OK when cold, you should be able to make a good copy of them onto disk. Then blow them into EPROMs, and modify the Mac+ to use said EPROMs (I believe a very small mod is needed, alas, but I don't know that much about the Mac+ hardware). IMHO that's not piracy - it's simply using a backup copy on new media since the original media failed. However, a pair of EPROMs would probably cost about $15, so that's no solution either. In the past I _have_ spent more on repairing/restoring a machine than buying a new one would cost. The reason is simple - I enjoy doing said repairs. A hobby doesn't have to make financial sense. [...] >Thanks in advance... <<<John>>> > >P.S. Anybody also know of a source for a LaserWriter Plus logic board, too? What's wrong with the old one. From the pictures I've seen of said board (Sorry, I don't have one, only a CX-VDO (same engine, but with no logic board) and a Laserwriter 2NT), it looks to be mostly standard components, and should be repairable. -tony

28 years, 8 months

TRW Swap Meet

by coslor＠pscosf.peru.edu

Hey Marvin: I was wondering if any of your recent Atari acquisitions are for sale. I am especially interested on a good deal on a drive and some software... PLEASE let me know.. CORD //*=====================================================================++ || Cord G. Coslor P.O. Box 308 - 1300 3rd St. Apt "M1" -- Peru, NE || || (402) 872- 3272 coslor(a)bobcat.peru.edu 68421-0308 || || Classic computer software and hardware collector || || Autograph collector || ++=====================================================================*// On Wed, 31 Dec 1969, Marvin wrote: > I went to the TRW Swap Meet today down in Los Angeles and managed to get > a few things. A guy was selling a fairly complete Aquarius that > included the cassette recorder, printer/plotter, expansion chassis, a > 32K expansion unit, some games, and documentation. He was asking $25 > but took $20 for the lot. Also picked up an Epson PX-8 portable and an > NEC 8201 portable (sure hope those numbers are correct as I am going > from memory) for $25 lot. The "best" deal was a guy walking around with > a sign that said "Free Atari". Of course, that got my attention and I > picked the 5 boxes of stuff up. Haven't checked it all out yet, but > there were supposed to be three Atari 400 computers, Three disk drive > units, an 850 interface, a modem, docs, and some other stuff. Saw a guy > offering S-100 cards (mostly memory and HD cards) at $5 each. When I > asked why he was asking so much, he replied they weren't for sale. I > hadn't heard of the manufacturer of those particular cards, and figured > if schematics were available, they might be worth what he was asking. > > I met a friend of mine whom I hadn't seen for about a year. Turns out > he built one of the Altair computers I have and was one of the first > factory reps for Vector Graphic. Apparently among the many people he > called on was a place up around Berkeley with a name like Kentucky Fried > Computers (or something similar) and that was where Northstar Computers > got started. Apparently, he has some of the early SCCS stuff along with > most of the Vector Graphic docs, etc. so with any luck, I'll end up with > that stuff too. > >

28 years, 8 months

bundling mail

by lwalker＠mail.interlog.com

I recall seeing an option to bundle msgs in this list. How do I get this? Please bundle ?

28 years, 8 months

I need a Commodore Plus/4 Video Cable

by 107765.1161＠compuserve.com

Message text written by INTERNET:classiccmp@u.washington.edu >Does anyone have a Commodore Plus/4 video cable for sale or trade?< The 8-pin cable for the Plus/4 is exactly the same as the 8-pin cable for the (more common) Commodore 64 or 128. And, a 5-pin cable made for the 64 (the early models had a 5-pin port) will also work on a Plus/4. In fact, I think most home computer manufacturers (Atari, TI) used 5-pin cables with the composite, sound and ground on the same pins, so you could try one of those if you have one sitting around. Finally, if you want to hack one together, I can provide the pinout. Gil Parrish 107765.1161(a)compuserve.com

28 years, 8 months

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